Energetic electron precipitation and VLF phase disturbances at middle latitudes following the magnetic storm of December 16, 1971

Details Energetic electron precipitation and VLF phase disturbances at middle latitudes following the magnetic storm of December 16, 1971 Energetic electron precipitation and VLF phase disturbances at middle latitudes following the magnetic storm of December 16, 1971

Apr 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977jgr....82.1519l&link_type=abstract

Journal of Geophysical Research, vol. 82, Apr. 1, 1977, p. 1519-1524. Research supported by the Lockheed Independent Research P

Physics

1

Electron Precipitation, Ionospheric Disturbances, Ionospheric Propagation, Magnetic Storms, Midlatitude Atmosphere, Very Low Frequencies, Atmospheric Ionization, D Region, Electron Flux Density, High Energy Electrons, Pair Production

Scientific paper

The paper presents simultaneous observations of D region disturbances determined from long-distance midlatitude (L between about 2 and 4) VLF transmissions and energetic electron (above 130 keV) observations obtained from the 1971-089A spacecraft during a series of geomagnetic storms that began on December 16, 1971. The energetic electron precipitation and VLF phase disturbances lasted nearly a week, the quantitative connection of these two data sets is presented as the first direct evidence of prolonged D region ionization enhancements due to energetic electrons (including relativistic electrons of at least 500 keV) at midlatitudes during a major geomagnetic storm. It is concluded that precipitating energetic electrons may disturb VLF radio wave propagation for extended periods even at midlatitudes.

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